The film “Titanic” was incredibly successful. It won 11 Academy Awards and launched the careers of its leads, Kate Winslet and Leonardo DiCaprio. In order to make such an epic film, the producers had to spend a lot of money.
Specifically, it cost $200 million. Part of the cost of the film was building a partial replica of the ship itself. The movie actually cost more than the real Titanic.
In 1910-1912 when the Titanic was being built, it cost about $7.5 million. In 1997 dollars, when the movie was made, that would be about $120-$150 million.